Outdoor high voltage isolating switch

The utility model provides an outdoor high voltage isolating switch, including the two insulated supporter, be fixed with fixed blade and knife section respectively on the two insulated supporter, the knife section is articulated with the insulated supporter, and form between fixed blade and the knife section and close, divide the switch, the knife section is divided by the portion of locking, contact site, spreading portion and the four bibliographic categories of articulated portion and forms, and spreading portion comprises wedge, dovetail guide, the portion of locking by the hasp with hang the platform and form, also be equipped with the pull ring of controlling the spreading and locking on the knife section. This outdoor high voltage isolating switch is reliable and stable when closing a floodgate, and is light laborsaving when the disconnection, can ensure to close, the reliability of separating brake action and high voltage transmission lines's security.